If you find a large directory, and most of the files are new, that
directory may not be suitable for removal, as it is still being used.
Here is a script that lists a summary of file sizes, broken down into
the time of last modification.
You may remember that
ls -l
will list the month, day, hour, and minute
if the file is less than six months old, and show the month, day, and
year if the file is more than six months old. Using this, the script
creates a summary for each of the last six months, and each year for
files older than that: